← Back to Search

Monoclonal Antibodies

SRK-015 for Spinal Muscular Atrophy (TOPAZ Trial)

Phase 2
Waitlist Available
Led By Thomas O. Crawford, MD
Research Sponsored by Scholar Rock, Inc.
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
Non-ambulatory patients must be able to sit independently per World Health Organization (WHO) motor milestones definition at screening.
Receiving the same background SMA therapy for at least 6 months prior to screening and anticipated to remain on that therapy throughout the duration of the study.
Timeline
Screening 3 weeks
Treatment Varies
Follow Up baseline to 12 months
Awards & highlights

TOPAZ Trial Summary

This trial will test a possible treatment for later-onset Spinal Muscular Atrophy, which is a degenerative disease that causes muscle weakness.

Who is the study for?
This trial is for children and adults aged 2-21 with later-onset Spinal Muscular Atrophy (Types 2 or 3). Participants must have been on stable SMA therapy for at least six months, be able to perform certain motor functions, and not rely heavily on ventilators. Pregnant individuals, those with severe scoliosis or recent major surgeries, or a history of hypersensitivity to monoclonal antibodies are excluded.Check my eligibility
What is being tested?
The TOPAZ study tests the safety and effectiveness of SRK-015 in treating patients with Type 2 or Type 3 Spinal Muscular Atrophy. It aims to see how well this new drug can improve muscle function in both non-ambulatory and ambulatory participants who meet specific health criteria.See study design
What are the potential side effects?
While the side effects of SRK-015 are not detailed here, similar treatments often include risks like allergic reactions to the infusion, potential infections due to weakened immune responses from treatment, injection site reactions, fatigue, headache, nausea and possible impacts on growth in children.

TOPAZ Trial Eligibility Criteria

Inclusion Criteria

You may be eligible if you check “Yes” for the criteria below
Select...
I can sit up by myself even though I cannot walk.
Select...
I have been on the same SMA treatment for at least 6 months and plan to continue it during the study.
Select...
I have been diagnosed with 5q spinal muscular atrophy.
Select...
I was diagnosed with Type 2 or Type 3 SMA before starting any approved SMA treatments.
Select...
I can walk 10 meters in less than 30 seconds without help or devices.
Select...
I can get medicine through an IV and give blood samples for the study.
Select...
I can travel to the study center and follow all study requirements.
Select...
I am between 5 and 21 years old for Cohorts 1 and 2, or at least 2 years old for Cohort 3.
Select...
I can perform physical tasks required by the study without limitations.

TOPAZ Trial Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~baseline to 12 months
This trial's timeline: 3 weeks for screening, Varies for treatment, and baseline to 12 months for reporting.

Treatment Details

Study Objectives

Outcome measures can provide a clearer picture of what you can expect from a treatment.
Primary outcome measures
Cohort 1: Change From Baseline in the Revised Hammersmith Scale (RHS) Total Score at Day 364 (Visit 15) [Month 12]
Cohort 2 and Cohort 3: Change From Baseline in Hammersmith Functional Motor Scale Expanded (HFMSE) Total Score at Day 364 (Visit 15) [Month 12]
Secondary outcome measures
Cohort 1: Change From Baseline in 10-Meter Walk/Run (From RHS)
Cohort 1: Change From Baseline in 30-Second Sit-to-Stand
Cohort 1: Change From Baseline in 6-Minute Walk Test (6MWT)
+8 more

TOPAZ Trial Design

3Treatment groups
Experimental Treatment
Group I: Cohort 3Experimental Treatment1 Intervention
Type 2 SMA
Group II: Cohort 2Experimental Treatment1 Intervention
Type 2 SMA / Non-Ambulatory Type 3 SMA
Group III: Cohort 1Experimental Treatment1 Intervention
Ambulatory Type 3 SMA

Find a Location

Who is running the clinical trial?

Scholar Rock, Inc.Lead Sponsor
3 Previous Clinical Trials
560 Total Patients Enrolled
Thomas O. Crawford, MDPrincipal InvestigatorJohns Hopkins University

Media Library

SRK-015 (Monoclonal Antibodies) Clinical Trial Eligibility Overview. Trial Name: NCT03921528 — Phase 2
Spinal Muscular Atrophy Research Study Groups: Cohort 1, Cohort 3, Cohort 2
Spinal Muscular Atrophy Clinical Trial 2023: SRK-015 Highlights & Side Effects. Trial Name: NCT03921528 — Phase 2
SRK-015 (Monoclonal Antibodies) 2023 Treatment Timeline for Medical Study. Trial Name: NCT03921528 — Phase 2
Spinal Muscular Atrophy Patient Testimony for trial: Trial Name: NCT03921528 — Phase 2

Frequently Asked Questions

These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.

Does this research represent a pioneering endeavor?

"SRK-015 has been studied since 2019, beginning with an inaugural trial sponsored by Scholar Rock Inc. which involved 58 participants. This drug subsequently received its Phase 2 approval in the same year and is currently being evaluated in two active studies conducted across 24 cities and 9 nations worldwide."

Answered by AI

Are individuals being enlisted for this research currently?

"This research project is no longer recruiting participants. It first appeared on April 22nd 2019 and the latest update was October 24th 2022. If you are seeking other trials, there are 233 studies actively looking for patients with muscular atrophy as well as 2 clinical assessments that need guinea pigs to investigate SRK-015."

Answered by AI

What locations in Canada are overseeing this research endeavor?

"This medical trial has open enrolment in 11 different locations, including Norfolk, New york and Phoenix. To reduce travel time if you choose to partake, it is wise to select the closest site from your location."

Answered by AI

How many participants are engaged in the trial?

"At this time, enrollment for the clinical trial has been closed. Initially posted in April 2019 and last updated October 2022, no more participants are being accepted at present. However, 233 other studies related to muscular atrophy are still actively recruiting volunteers and two trials for SRK-015 as well."

Answered by AI

Can octogenarians partake in this medical trial?

"The youngest participants eligible for the trial must be two years old and no older than twenty-one at the time of enrollment."

Answered by AI

What alleged threat does SRK-015 pose to a patient's health?

"Preliminary clinical evidence suggests SRK-015 is safe, thus it has been given a score of 2 on the safety scale. As this is still in Phase 2 trials though, more data needs to be collected before efficacy can be determined."

Answered by AI

Has SRK-015 been previously researched in any other clinical research projects?

"Currently, two studies are in progress investigating SRK-015. One of them is in its final phase (Phase 3). While the main research site for these trials is San Diego, California, there are an additional 53 sites conducting related investigations."

Answered by AI

What goals are investigators seeking to accomplish through this experiment?

"This trial, to be assessed over a Baseline up to 12 months period, aims to evaluate the Change From Baseline in Hammersmith Functional Motor Scale Expanded (HFMSE) Total Score at Day 364 (Visit 15). It also considers the secondary outcomes of Cohort 1: Change From Baseline in Timed Rise From Floor (From RHS), Cohort 2 &3: Change From Baseline in HFMSE Total Score at Other Prespecified Timepoints and Cohort 1's Change From Baseline in 10-Meter Walk/Run."

Answered by AI

Am I eligible to join this research study?

"This clinical trial requires 58 participants, aged between two and 21 years old, who have been diagnosed with muscular atrophy. Additionally, they must be able to satisfy the following criteria: Non-ambulatory individuals will need to demonstrate their ability to remain upright for 10 seconds without external support; patients that are eligible should possess a later-onset SMA diagnosis prior to receiving any treatment; those enrolled in this study should expect IV infusions and blood sample collection over an extended period of time; nutritional status must not have changed significantly in the six months leading up ambulating patients must be capable of traversing ten meters within 30 seconds (for cohorts"

Answered by AI

Who else is applying?

How old are they?
18 - 65
What site did they apply to?
Childrens Medical Center Dallas
Stanford University
What portion of applicants met pre-screening criteria?
Did not meet criteria
Met criteria
What state do they live in?
Texas
How many prior treatments have patients received?
0

Why did patients apply to this trial?

I have degenerative Disc Disease and looking for help.
PatientReceived 1 prior treatment
~10 spots leftby Apr 2025